Statement [Table] Statement [Line Items] Document Type Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Consolidated Statement of Income [Abstract] Revenues Revenue Interest Income and Other Interest & other income Includes operating interest income earned as part of a core business activity, equity income representing the undistributed income or loss of investments which are accounted for under the equity method of accounting, and other miscellaneous income or loss earned from core business activities. Expenses Costs and Expenses [Abstract] Research and Development Expense Research & engineering General and Administrative Expense General & administrative Interest Expense Interest expense included in the segment results Interest Income Loss from Continuing Operations Before Income Taxes Minority Interest and Income Loss from Equity Method Investments Income before taxes Income Tax Expense (Benefit) Consolidated taxes on income Taxes on income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net income Net Income Loss Attributable to Noncontrolling Interest Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Parent Net income attributable to Schlumberger Net income Earnings Per Share, Basic Net income Earnings Per Share, Diluted Net income Weighted Average Number of Shares Outstanding, Diluted [Abstract] Average Shares Outstanding Average shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic Weighted Average Number of Shares Outstanding, Diluted Diluted Assuming dilution Consolidated Balance Sheet [Abstract] Assets [Abstract] ASSETS Assets Current [Abstract] Current Assets Cash Cash Short-term Investments Short-term investments Receivables less allowance for doubtful accounts (2012 - $169; 2011 - $177) Receivables, Net, Current Inventory, Net Inventories Inventories Deferred Tax Assets, Net, Current Deferred taxes Other Assets, Current Other current assets Assets Current Current assets total Held-to-maturity Securities, Noncurrent Fixed Income Investments, held to maturity Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investments in Affiliated Companies Property, Plant and Equipment, Net Fixed assets less accumulated depreciation Fixed Assets less accumulated depreciation Multiclient Seismic Data Balance at June 31, 2012 Balance at December 31, 2011 Multiclient Seismic Data Capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis, net of amortization. Balance at June 30, 2012 Goodwill Balance at January 1, 2012 Goodwill Intangible Assets, Net (Excluding Goodwill) Intangible Assets Intangible Assets, Net (Excluding Goodwill), Total Other Assets, Noncurrent Other Assets Assets Total Assets Liabilities and Equity [Abstract] LIABILITIES AND EQUITY Liabilities, Current [Abstract] Current Liabilities Accounts Payable and Accrued Liabilities, Current Accounts payable and accrued liabilities Accrued Income Taxes, Current Liability for taxes on income Dividends Payable, Current Dividends payable Long-term Debt, Current Maturities Long-term debt - current portion Short-term Debt Short-term borrowings Liabilities, Current Current Liabilities Total Other Long-term Debt, Noncurrent Other Long-term Debt, Noncurrent, Total Long-term Debt Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Postretirement Benefits Deferred Tax Liabilities, Noncurrent Deferred Taxes Other Liabilities, Noncurrent Other Liabilities Liabilities Total Liabilities Stockholders' Equity, Including Portion Attributable To Noncontrolling Interest [Abstract] Equity Common Stock, Value, Issued Common stock Treasury Stock, Value Treasury stock Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Stockholders' Equity Attributable to Parent Schlumberger stockholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Ending Balance Beginning Balance Total equity Liabilities and Equity Liabilities and stockholders equity Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts on receivable Consolidated Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Depreciation, Depletion and Amortization Depreciation and amortization Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Earnings of companies carried at equity, less dividends received Deferred Income Tax Expense (Benefit) Deferred income taxes Share-based Compensation Stock-based compensation expense Increase (Decrease) in Pension and Postretirement Obligations Pension and other postretirement benefits expense Pension and Other Postretirement Benefit Contributions Pension and other postretirement benefits funding Increase (Decrease) in Operating Capital [Abstract] Change in assets and liabilities: Increase (Decrease) in Receivables Increase in receivables Increase (Decrease) in Inventories Increase in inventories Increase (Decrease) in Accounts Payable and Accrued Liabilities (Decrease) increase in accounts payable and accrued liabilities Increase (Decrease) in Income Taxes Payable Decrease in liability for taxes on income Increase (Decrease) in Other Operating Liabilities (Decrease) increase in other liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Other-net Net Cash Provided by (Used in) Operating Activities NET CASH PROVIDED BY OPERATING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Capital expenditures Payments for Proceeds from Capitalized Costs Support Equipment and Facilities Multiclient seismic data capitalized The net cash outflow from capitalized costs directly incurred in acquiring and processing of seismic surveys that are licensed on a nonexclusive basis. Sale (purchase) of investments, net Payments for (Proceeds from) Investments Payments for (Proceeds from) Other Investing Activities Other Net Cash Provided by (Used in) Investing Activities NET CASH USED IN INVESTING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Payments of Dividends Dividends paid Proceeds from Stock Plans Proceeds from employee stock purchase plan Proceeds from Stock Options Exercised Proceeds from exercise of stock options Payments for Repurchase of Equity Stock repurchase program Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Repayments of Long-term Debt Repayment of long-term debt Net increase (decrease) in short-term borrowings Proceeds from (Repayments of) Short-term Debt Net Cash Provided by (Used in) Financing Activities NET CASH USED IN FINANCING ACTIVITIES Net decrease in cash before translation effect Cash and Cash Equivalents, Period Increase (Decrease) Effect of Exchange Rate on Cash and Cash Equivalents Translation effect on cash Cash and Cash Equivalents, at Carrying Value Cash, end of period Cash, beginning of period Consolidated Statement of Equity [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Issued Treasury Stock [Member] Common Stock In Treasury Retained Earnings [Member] Retained Earnings Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Loss Noncontrolling Interests [Member] Noncontrolling Interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Currency translation adjustments Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Changes in fair value of derivatives Stock Issued During Period, Value, Stock Options Exercised Shares sold to optionees, less shares exchanged Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock Stock Issued During Period, Value, Employee Stock Purchase Plan Shares issued under employee stock purchase plan Treasury Stock, Value, Acquired, Cost Method Stock repurchase program Stock-based compensation expense Stock Issued During Period, Value, Share-based Compensation Stockholders' Equity, Other Other Dividends declared ($0.55 per share and $0.50 per share) Dividends, Cash Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Shares sold to optionees, less shares exchanged, in Shares Shares issued under employee stock purchase plan, in Shares Stock Issued During Period, Shares, Employee Stock Purchase Plans Stock repurchase program, in Shares Treasury Stock, Shares, Acquired Common Stock, Dividends, Per Share, Declared Dividends declared, per share Restructuring and Related Activities Disclosure [Text Block] Charges and Credits Inventory Disclosure [Text Block] Inventories Property, Plant and Equipment Disclosure [Text Block] Fixed Assets Multiclient Seismic Data [Text Block] Multiclient Seismic Data Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. Intangible Assets Disclosure [Text Block] Intangible Assets Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments and Hedging Activities Long-term Debt Long-term Debt [Text Block] Income Tax Disclosure [Text Block] Income Tax Segment Information Segment Reporting Disclosure [Text Block] Pension and Other Postretirement Benefits Disclosure [Text Block] Pension and Other Postretirement Benefits Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Text Block] Fair values of outstanding derivative instruments Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Text Block] Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income Schedule of Segment Reporting Information, by Segment [Text Block] Schedule of Segment Reporting Information, by Segment Debt Instrument [Axis] Debt Instrument, Name [Domain] Type of Restructuring [Domain] Debt Instrument, Face Amount Notes relating to interest rate swap Guaranteed Notes Five Point Two Five Percent Due Two Thousand Thirteen [Member] 5.25% Guaranteed Notes due 2013 [Member] Guaranteed notes five point two five percent due two thousand thirteen. Guaranteed Notes Three Point Zero Zero Percent Due Two Thousand Thirteen [Member] 3.00% Guaranteed Notes due 2013 [Member] Guaranteed notes three point zero zero percent due two thousand thirteen. Debt, Other [Member] Other variable rate debt [Member] Debt, other. Net Income Loss Attributable to Reporting Entity [Abstract] Schlumberger Income from Continuing Operations Schlumberger amounts attributable to: Net Income (Loss) Available to Common Stockholders, Diluted Diluted Incremental Common Shares Attributable to Call Options and Warrants Assumed exercise of stock options Incremental Common Shares Attributable to Nonvested Shares with Forfeitable Dividends Unvested restricted stock Senior Notes Eight Point Six Two Five Due Two Thousand Fourteen [Member] 8.625% Senior Notes due 2014 [Member] Senior notes eight point six two five due two thousand fourteen. Senior Notes Six Point Zero Zero Due Two Thousand Sixteen [Member] 6.00% Senior Notes due 2016 [Member] Senior notes six point zero zero due two thousand sixteen. Senior Notes Nine Point Seven Five Due Two Thousand Nineteen [Member] 9.75% Senior Notes due 2019 [Member] Senior notes nine point seven five due two thousand nineteen. Tradenames [Member] Tradenames [Member] Customer Relationships [Member] Customer Relationships [Member] Finite-Lived Intangible Assets, Weighted-Average Useful Life Weighted Average Amortization Period for all Intangible Assets (Years) Inventory, Net [Abstract] Inventory Inventory, Raw Materials and Supplies Raw materials & field materials Inventory, Work in Process Work in process Inventory, Finished Goods Finished goods Property, Plant and Equipment, Net, by Type [Abstract] Property, Plant and Equipment Property, Plant and Equipment, Gross Property, plant & equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation Depreciation Depreciation expense relating to fixed assets Change in Carrying Amount of Multiclient Seismic Data [Abstract] Multiclient Seismic Data Change in the carrying amount of multiclient seismic data. Multiclient Seismic Data Capitalized in Period Capitalized in period Multiclient seismic data, capitalized in period. Multiclient Seismic Data Charged to Cost of Goods Sold and Services Charged to expense Multiclient seismic data, charged to cost of goods sold and services. Goodwill [Roll Forward] Schedule of Goodwill Oilfield Services [Member] Oilfield Services [Member] Oilfield services. Goodwill, Translation and Purchase Accounting Adjustments Impact of changes in exchange rates Intangible Assets, Net (Excluding Goodwill) [Abstract] Gross book value and accumulated amortization of intangible assets Intangible Assets by Major Class [Axis] Intangible assets by major class. Intangible Assets, Major Class Name [Domain] Intangible assets, major class name. Technology/Technical Know-How [Member] Technology/Technical Know-How [Member] Intangible Assets Gross Excluding Goodwill Intangible assets, gross (excluding goodwill). Gross Book Value Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Future Amortization Expense, Year One Estimated amortization charged to income, 2012 Future Amortization Expense, Year Two Estimated amortization charged to income, 2013 Estimated amortization charged to income, 2014 Future Amortization Expense, Year Three Future Amortization Expense, Year Four Estimated amortization charged to income, 2015 Future Amortization Expense, Year Five Estimated amortization charged to income, 2016 Derivatives, by Derivative Instrument Contract [Axis] Derivatives, by derivative instrument contract. Derivatives, by Derivative Instrument Contract [Domain] Derivatives, by derivative instrument contract. Fixed Rate Debt [Member] Fixed Rate Debt [Member] Fixed rate debt. Floating Rate Debt [Member] Floating Rate Debt [Member] Floating rate debt. Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Recognized a cumulative net loss in equity relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges Notional Amount of Foreign Currency Derivatives Contracts outstanding in various foreign currencies relate to hedges of debt Contracts outstanding in various foreign currencies (US dollar equivalent) Fixed Rate Debt Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps Fixed rate debt. Variable Rate Debt Variable rate debt aggregate, after taking into account the effects of the interest rate swaps Variable rate debt. Notional Amount of Interest Rate Derivatives Notional amount of interest rate swap Derivative, Swaption Interest Rate Derivative swap interest rate Derivative, Fair Value, Net [Abstract] Fair values of outstanding derivative instruments Derivative Contract Type [Domain] Foreign Exchange Contract [Member] Foreign exchange contracts [Member] Interest Rate Swaps [Member] Interest rate swaps [Member] Commodity Contracts [Member] Commodity Contracts [Member] Derivatives, Fair Value, by Balance Sheet Location [Axis] Balance Sheet Location [Domain] Other Current Assets [Member] Other current assets [Member] Other current assets. Other Assets [Member] Other Assets [Member] Accounts Payable and Accrued Liabilities [Member] Accounts payable and accrued liabilities [Member] Accounts payable and accrued liabilities. Other Liabilities [Member] Other Liabilities [Member] Derivative Asset, Fair Value, Gross Asset Derivative assets Derivative Liability, Fair Value, Gross Liability Derivative Liabilities Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income Derivative Instruments, Gain (Loss) by Hedging Relationship [Axis] Hedging Relationship [Domain] Fair Value Hedging [Member] Fair Value Hedging [Member] Nondesignated [Member] Derivative not designated as hedges [Member] Derivative Instruments, Gain (Loss) by Income Statement Location [Axis] Income Statement and Other Comprehensive Income Location [Domain] Cost of Sales [Member] Cost of revenue [Member] Interest Expense [Member] Interest expense [Member] Derivative Instruments, Gain (Loss) Recognized in Income, Net Gain/(loss) recognized in income Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Gain (Loss) Reclassified from Accumulated OCI into Income Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Gain (Loss) Recognized in OCI Summary of Other Long-term Debt [Abstract] Summary of Long-Term Debt Summary of other long-term debt. Long-term Debt, Gross Long-term debt, carrying amount Fair Value Adjustment Hedging Carrying Amount Fair value adjustment-hedging Fair value adjustment, hedging, carrying amount Debt Instrument, Fair Value Disclosure Long-term debt, fair value Income (Loss) from Continuing Operations before Income Taxes and Minority Interest Income (loss) from continuing operations before income taxes and minority interest. Income (Loss) from Continuing Operations before Income Taxes and Minority Interest, Total Deferred Tax Assets, Net [Abstract] Components of Net Deferred Tax Assets Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Postretirement benefits, net Deferred Tax Assets, Intangible Assets Intangible assets Deferred tax assets, intangible assets. Deferred Tax Assets, Other Other, net Deferred Tax Assets, Net Deferred Tax Assets, Net, Total Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of Consolidated Taxes on Income Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current: Current Federal Tax Expense (Benefit) United States - Federal Current State and Local Tax Expense (Benefit) United States - State Current Foreign Tax Expense (Benefit) Outside United States Current Income Tax Expense (Benefit) Current Income Tax Expense (Benefit), Total Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred: Deferred Federal Income Tax Expense (Benefit) United States - Federal Deferred State and Local Income Tax Expense (Benefit) United States - State Deferred Foreign Income Tax Expense (Benefit) Outside United States Valuation Allowance, Deferred Tax Asset, Change in Amount Valuation allowance Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] Reconciliation of the US statutory federal tax rate to the consolidated effective income tax rate Non-US income taxed at different rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential Effective Income Tax Rate Reconciliation, Other Adjustments Other Effective income tax rate Effective income tax rate Distribution [Member] Distribution [Member] Distribution. Corporate and Other [Member] Corporate & other [Member] Corporate and other. Interest Income [Member] Interest income [Member] Charges and Credits [Member] Charges & credits [Member] Charges and credits. Segment Reporting Information, Revenue for Reportable Segment Revenue Defined Benefit Plans Disclosures, Defined Benefit Plans [Axis] Defined Benefit Plans [Domain] United States Pension Plans of US Entity Defined Benefit [Member] US [Member] Foreign Pension Plans, Defined Benefit [Member] International [Member] Service cost-benefits earned during the period Interest Cost on Accumulated Postretirement Benefit Obligation Interest cost on projected benefit obligation Interest cost on accumulated postretirement benefit obligation Expected Return on Plan Assets Amortization of Net Loss Amortization of net loss Amortization of prior service cost Amortization of prior service cost Amortization of prior service cost Defined Benefit Plan, Net Periodic Benefit Cost before Curtailments Total pension cost Defined benefit plan, net periodic benefit cost before curtailments. Document and Entity Information [Abstract] Document and entity information. Schedule of Goodwill [Table] Goodwill [Line Items] Schedule of Intangible Assets by Major Class [Table] Schedule of intangible assets by major class. Intangible Assets [Line Items] Intangible assets. Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivatives, Fair Value [Line Items] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Line Items] Derivative [Table] Derivative [Line Items] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Segment Information (Textual) [Abstract] Segment Information (Textual) [Abstract] Segment information. Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Earnings Per Share Reconciliation [Abstract] Reconciliation of Earnings Per Share United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member] Postretirement Medical Plan [Member] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan Disclosure [Line Items] Intangible Assets Additional Information [Abstract] Intangible assets - additional information. Intangible Assets - Additional Information Number of Countries in which Company Conducts Business Number of countries in which Schlumberger conducts business Number of countries in which company conducts business. Derivative Instruments and Hedging Activities (Textual) [Abstract] Derivative Instruments and Hedging Activities (Textual) [Abstract] Derivative instruments and hedging activities. Long-term Debt (Textual) [Abstract] Long-term Debt (Textual) [Abstract] Long-term debt. Multiclient Seismic Data [Abstract] Multiclient seismic data. Disclosure Net Pension Cost for Parent Company Pension Plans [Abstract] Net Pension Cost for the Schlumberger Pension Plans Disclosure net pension cost for the parent company pension plans. Income (Loss) from Continuing Operations Attributable to Parent Basic Income from continuing operations Income (Loss) from Continuing Operations, Per Basic Share Basic Income from continuing operations Income (Loss) from Continuing Operations, Per Diluted Share Diluted Income from continuing operations Merger Related Transaction Costs [Member] Merger-related transaction costs [Member] Merger related transaction costs. Guaranteed Notes Four Point Five Zero Percent Due Two Thousand Fourteen [Member] 4.50% Guaranteed Notes due 2014 [Member] Guaranteed notes four point five zero percent due two thousand fourteen. Guaranteed Notes Two Point Seven Five Percent Due Two Thousand Fifteen [Member] 2.75% Guaranteed Notes due 2015 [Member] Guaranteed notes two point seven five percent due two thousand fifteen. Unsuccessful Business Combination Costs Merger & integration Finite-Lived Intangible Assets, Amortization Expense Amortization expense on intangible assets excluding goodwill Price Risk Derivative Instruments not Designated as Hedging Instruments, at Fair Value, Net Commodity forward contract outstanding Deferred Tax Assets, Investment in Subsidiaries Investments in non-US Subsidiaries Reservoir Characterization [Member] Reservoir Characterization [Member] Reservoir characterization. Drilling [Member] Drilling [Member] Drilling. Other Services [Member] Eliminations and other [Member] Other services. Long-term Debt (Additional Textual) [Abstract] Long-term Debt (Additional Textual) [Abstract] Long-term debt. Repurchased Outstanding Senior Notes Due Repurchased outstanding senior notes due. Repurchase of senior notes Debt instrument interest rate Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Effective Percentage Effective interest rate on euro denominated debt Cost of Goods and Services Sold Cost of revenue Statement, Business Segments [Axis] Segment [Domain] Beginning Balance, in Shares Ending Balance, in Shares Shares, Outstanding Goodwill Disclosure [Text Block] Other Intangible Assets [Member] Other [Member] Research & engineering [Member] Restructuring Cost and Reserve [Axis] Derivative Instrument Risk [Axis] Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before taxes Derivative Asset, Fair Value, Net [Abstract] Derivative assets Derivative Liability, Fair Value, Net [Abstract] Derivative Liabilities Basis of Presentation [Abstract] Hedging Designation [Axis] Hedging Designation [Domain] Designated as Hedging Instrument [Member] Derivative designated as hedges [Member] Charges and Credits [Abstract] Fixed Assets [Abstract] Derivative Instruments and Hedging Activities [Abstract] Long-term Debt [Abstract] Income Tax [Abstract] Segment Information [Abstract] Pension and Other Postretirement Benefits [Abstract] Schedule of Earnings Per Share Reconciliation [Table Text Block] Reconciliation of Earnings Per Share Schedule of Inventory, Current [Table Text Block] Inventory Disclosure Multiclient Seismic Data [Table Text Block] Multiclient Seismic Data Table Disclosure of the carrying amount of multiclient seismic data based on completed and in-process seismic surveys. Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] Effect of derivative instruments in cash flow hedging relationships on income and other comprehensive income (OCI) Schedule of Long-term Debt Instruments [Table Text Block] Long-term Debt Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Income Tax Disclosure Table Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Components of Net Deferred Tax Assets Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Components of Consolidated Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation of the US Statutory Federal Tax Rate Schedule of Net Benefit Costs [Table Text Block] Net Pension Cost for the Schlumberger Pension Plans and US Postretirement Medical Plan Increase (Decrease) in Other Current Assets Increase in other current assets Pension Plans, Defined Benefit [Member] Pension Plans, Defined Benefit [Member] Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share from Continuing Operations Income Tax (Textual) [Abstract] Income tax. Income Tax (Textual) [Abstract] Expected return on plan assets Inventories [Abstract] Goodwill Goodwill [Abstract] Goodwill. Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract] Effect of derivative instruments in cash flow hedging relationships on income and other comprehensive income (OCI) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract] Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Income Tax Examination [Table] Income Tax Authority [Axis] Income Tax Authority [Domain] Domestic Country [Member] Domestic Country [Member] Foreign Country [Member] Foreign Country [Member] Income Tax Examination [Line Items] Deferred Tax Assets, Operating Loss Carryforwards, Domestic Deferred tax assets, valuation allowances relating to net operating losses in certain countries Schedule of Restructuring and Related Costs [Table] Restructuring Cost and Reserve [Line Items] Components of Deferred Income Taxes Components of deferred income taxes. Deferred income taxes Guaranteed Notes Four Point Two Zero Zero Percent Due Two Thousand Twenty One [Member] 4.200% Guaranteed Notes due 2021 [Member] Guaranteed notes four point two zero zero percent due two thousand twenty one. Summary of Charges and Credit (Textual) [Abstract] Summary of Charges and Credit (Textual) [Abstract] Summary of charges and credit. Restructuring Charges Pretax Charges pretax Restructuring charges pretax. Charges Charges, net Charges, net Charges. Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Contingencies Three Point Three Zero Percent Senior Notes Due Two Thousand Twenty One [Member] 3.300% Senior Notes due 2021 [Member] Three point three zero percent senior notes due two thousand twenty one. One Point Nine Five Percent Senior Notes Due Two Thousand Sixteen [Member] 1.950% Senior Notes due 2016 [Member] One point nine five percent senior notes due two thousand sixteen. Floating Rate Senior Notes Due Two Thousand Fourteen [Member] Floating Rate Senior Notes due 2014 [Member] Floating rate senior notes due two thousand fourteen. Face Amount of Debt Instrument Face amount of debt instrument Face amount of debt instrument. Other Payments to Acquire Businesses Business acquisitions, net of cash acquired Changes in Carrying Amount of Goodwill [Table Text Block] Changes in the carrying amount of goodwill Changes in the carrying amount of goodwill. Consolidated Statement of Comprehensive Income [Abstract] Prior Service Cost [Abstract] Prior service cost Prior service cost. Actuarial gain (loss) Actuarial Loss [Abstract] Actuarial loss. Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Prior service credit arising during the period Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax Amortization to net income of net prior service cost Actuarial gain (loss) arising during the period Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Reclassification to net income of net realized loss (gain) Net derivatives (loss) gain on hedge transactions Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Unrealized net change arising during the period Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Schlumberger Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Pension and other postretirement benefit plans Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract] Derivatives Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract] Currency translation adjustments Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax Amortization to net income of net actuarial loss Deferred employee benefits liabilities Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Plan Amendments, Tax Effect Income taxes on pension and other postretirement benefit plans Income Tax (Additional Textual) [Abstract] Income tax. Income Tax (Additional Textual) [Abstract] Segment Reporting Information by Segment [Abstract] Schedule of Segment Reporting Information, by Segment Segment reporting information by segment. Disclosure Net Periodic Benefit Cost for Parent Company Domestic Postretirement Medical Plan [Abstract] Net periodic benefit cost for the Schlumberger US postretirement medical plan Disclosure net periodic benefit cost for parent company domestic postretirement medical plan. Income from Continuing Operations before Taxes which were Subject to Domestic and Foreign Countries Income Taxes [Abstract] Income from before taxes subject to US and Non-US Income Taxes Income from continuing operations before taxes which were subject to domestic and foreign countries income taxes. Income (Loss) from Continuing Operations before Income Taxes Domestic Country United States The portion of earnings (loss) from continuing operations before income taxes that is attributable to domestic country operations. Income (Loss) from Continuing Operations before Income Taxes Foreign Country Outside United States The portion of earnings (loss) from continuing operations before income taxes that is attributable to foreign operations, which is defined as income (loss) generated from operations located outside the foreign country. Effective Income Tax Rate Reconciliation at Domestic Federal Statutory Income Tax Rate US statutory federal rate The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems. Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of Intangible Assets by Major Class Intangible Assets [Abstract] Amendment Flag Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation Earnings Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Employee stock options to purchase Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Outstanding Stock Awards [Member] Outstanding Stock Awards [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Senior Notes Two Point Sixty Five Zero Percent Due Two Thousand Sixteen [Member] 2.650% Senior Notes due 2016 [Member] Senior notes two point sixty five zero percent due two thousand sixteen. Senior Notes Four Point Two Zero Zero Percent Due Two Thousand Twenty One [Member] 4.200% Senior Notes due 2021 [Member] Senior notes four point two zero zero percent due two thousand twenty one. Effective Income Tax Rate Reconciliation, State and Local Income Taxes US state income taxes Amount of Dilutive Securities Assumed Exercise of Stock Option Assumed exercise of stock options Amount of dilutive securities assumed exercise of stock option. Amount of Dilutive Securities Unvested Restricted Stock Unvested restricted stock Amount of dilutive securities unvested restricted stock. Marketable Securities, Current Short-term investments and Fixed income investments, held to maturity Proceed from Divestiture of Businesses Proceed from sale of business Proceed from divestiture of businesses. Wilson Distribution Business [Member] Wilson distribution business. Wilson Distribution Business [Member] Subsequent Event [Table] Subsequent Event [Line Items] Derivative Instruments and Hedging Activities (Additional Textual) [Abstract] Derivative instruments and hedging activities. Derivative Instruments and Hedging Activities (Additional Textual) [Abstract] Derivative, by Nature [Axis] Derivative, Name [Domain] Debt [Member] Debt [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Goodwill, Allocation Adjustment Reallocation Production [Member] Production. Production [Member] Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Income from discontinued operations Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Income from continuing operations Earnings Per Share, Basic [Abstract] Basic earnings per share of Schlumberger: Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share Income from discontinued operations Earnings Per Share, Diluted [Abstract] Diluted earnings per share of Schlumberger: Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share Income from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Income from discontinued operations Income from discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Cash flows from discontinued operations - operating activities Global Connectivity Services business discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Cash flows from discontinued operations - investing activities Net Cash Provided by (Used in) Discontinued Operations Cash flows from discontinued operations Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures Shares granted to Directors Discontinued Operations [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations General and Administrative [Member] General and administrative. General and Administrative [Member] Summary of Charges [Abstract] Summary of charges. Summary of charges Charges Tax Charges, tax Restructuring charges tax. Summary of Charges [Table Text Block] Summary of charges Summary of charges. Discontinued Operations (Textual) [Abstract] Discontinued operations textual. Discontinued Operations (Textual) [Abstract] Discontinued Operations (Additional Textual) [Abstract] Discontinued Operations (Additional Textual) [Abstract] Discontinued operations additional textual. Proceeds from Divestiture of Businesses Proceeds from divestiture of Wilson distribution business Excess Tax Benefit from Share-based Compensation, Financing Activities Tax benefit on stock options Goodwill, Acquired During Period Acquisitions Goodwill, Written off Related to Sale of Business Unit Divestiture Discontinued Operations Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block] Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Abstract] Discontinued Operations Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Income before taxes Disposal Group, Including Discontinued Operation, Revenue Revenue Discontinued Operation, Tax Effect of Discontinued Operation Tax expense Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Gain on divestiture, net of tax Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax pre tax gain Discontinued Operation Percentage of Interest Sold Percentage of Schlumberger completed the sale of interest in CE Franklin Ltd. to NOV Discontinued operation percentage of interest sold. CE Franklin Ltd. [Member] CE Franklin limited. CE Franklin Limited [Member] Intangible Assets (Textual) [Abstract] Intangible Assets. Intangible Assets (Textual) [Abstract] Future Amortization Expense Year Six Estimated amortization charged to income, 2017 The amount of amortization expense expected to be recognized during year six of the six succeeding fiscal years. Depreciation expense relating to fixed assets. Depreciation Expense Relating to Fixed Assets [Abstract] Depreciation expense relating to fixed assets Depreciation Expense Relating to Fixed Assets [Table Text Block] Depreciation expense relating to fixed assets Depreciation expense relating to fixed assets. Amortization expense charged to income for intangible assets Amortization Expense Charged to Income for Intangible Assets [Table Text Block] Amortization expense charged to income for intangible assets. Amortization Expense Charged to Income for Intangible Assets [Abstract] Amortization expense charged to income for intangible assets Amortization expense charged to income for intangible assets.